Based on the information provided in the diagram, we can assign the following energy forms to each number:
1- Potential energy (since it is at a higher position, ready to fall)
2- Kinetic energy (since it is in motion)
3- Sound energy (since it represents a sound)
4- Thermal energy (due to the friction generated during the bounce)
W- It is not clear from the given information what energy form is represented by "W".
I- It is not clear from the given information what energy form is represented by "I".
8- It is not clear from the given information what energy form is represented by "8".
Please note that the diagram does not provide enough information to determine the exact energy forms for "W", "I", and "8". It is important to have additional context or details to accurately assign the energy forms to these numbers.